<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
          <el-table :data="roleList" stripe border>
            <!-- 展开列 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-row
                  :class="['bdbottom', 'vcenter', index1 === 0 ? 'bdtop' : '']"
                  v-for="(item1, index1) in scope.row.children"
                  :key="item1.id"
                >
                  <!-- 渲染一级权限 -->
                  <el-col :span="5">
                    <el-tag closable @close="removeRightById(scope.row, item1.id)">{{
                      item1.authName
                    }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染二级权限 -->
                  <el-col :span="19">
                    <el-row
                      :class="['vcenter', index2 !== 0 ? 'bdtop' : '']"
                      v-for="(item2, index2) in item1.children"
                      :key="item2.id"
                    >
                      <el-col :span="6">
                        <el-tag
                          type="success"
                          closable
                          @close="removeRightById(scope.row, item2.id)"
                          >{{ item2.authName }}</el-tag
                        >
                        <i class="el-icon-caret-right"></i>
                      </el-col>
                      <el-col :span="18">
                        <el-tag
                          v-for="item3 in item2.children"
                          :key="item3.id"
                          type="warning"
                          closable
                          @close="removeRightById(scope.row, item3.id)"
                        >
                          {{ item3.authName }}</el-tag
                        >
                      </el-col>
                    </el-row>
                  </el-col>
                </el-row>
                <!--显示本行全部数据-->
                <!-- {{ scope.row }} -->
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"> </el-table-column>
            <el-table-column label="角色名称" prop="roleName" width="250">
            </el-table-column>
            <el-table-column label="角色描述" prop="roleDesc" width="250">
            </el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeRoleById(scope.row.id)"
                  >删除</el-button
                >
                <el-button
                  type="warning"
                  icon="el-icon-setting"
                  size="mini"
                  @click="showSetRightDialog(scope.row)"
                  >分配权限</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-col>
      </el-row>
    </el-card>
    <!-- 添加用户对话框 -->
    <el-dialog
      title="添加角色信息"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addRoleDialogClose"
    >
      <!-- 内容主体区 -->
      <el-form :model="addRoleForm" ref="addRoleFormRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色对话框 -->
    <el-dialog
      title="修改角色信息"
      :visible.sync="editDialogVisible"
      width="50%"
      @click="editDialogClosed"
    >
      <el-form :model="editForm" ref="editFormRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRolesInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      //所有角色列表
      roleList: [],
      //添加角色表单数据
      addRoleForm: {
        roleName: "",
        roleDesc: "",
      },
      //添加角色对话框显示与隐藏
      addDialogVisible: false,
      //监听添加角色对话框关闭事件
      addRoleDialogClose() {
        this.$refs.addFormRef.resetFields();
      },
      //编辑角色数据列表
      editForm: {
        roleName: "",
        roleDesc: "",
      },
      //编辑角色对话框的显示与隐藏
      editDialogVisible: false,
      //分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限的 数据
      rightslist: [],
      //树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      //默认选中的节点ID值数组
      defKeys: [],
      //当前即将分配权限的角色id
      roleId: "",
    };
  },
  created() {
    this.getRoleList();
  },
  methods: {
    //获取所有角色列表
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) this.$message.error("角色列表获取失败");
      console.log(res.data);
      this.roleList = res.data;
    },
    //添加角色信息
    async addRole() {
      const { data: res } = await this.$http.post("roles", this.addRoleForm);
      if (res.meta.status !== 201) return this.$message.error("角色信息添加失败");
      // 添加成功后隐藏对话框
      this.addDialogVisible = false;
      //重新获取角色的列表
      this.getRoleList();
    },
    //点击编辑显示角色信息
    async showEditDialog(id) {
      console.log(id);
      const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status !== 200) return this.$message.error("角色信息修改失败");
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //修改角色信息并提交
    async editRolesInfo() {
      const { data: res } = await this.$http.put("roles/" + this.editForm.roleId, {
        roleName: this.editForm.roleName,
        roleDesc: this.editForm.roleDesc,
      });
      if (res.meta.status !== 200) {
        return this.$message.error("修改角色信息失败");
      }
      // 修改成功后隐藏对话框
      this.editDialogVisible = false;
      //重新获取角色的列表
      this.getRoleList();
      //提示修改成功
      this.$message.success("更新角色信息成功");
    },
    //监听修改对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    //根据id删除对应的信息
    async removeRoleById(id) {
      //弹框询问是否删除数据
      const confirmResult = await this.$confirm(
        "此操作将永久删除该用户, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      //如果用户确认删除则返回字符串confirm
      //如果用户取消删除则返回字符串cancel
      // console.log(confirmResult);
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("角色删除失败");
      }
      this.$message.success("删除角色成功");
      this.getRoleList();
    },
    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      console.log(role);
      const { data: res } = await this.$http.delete(
        "roles/" + role.id + "/rights/" + rightId
      );
      if (res.meta.status !== 200) return this.$message.error("删除权限失败");
      this.$message.success("删除权限成功");
      role.children = res.data;
    },
    //展示分配权限对话框
    async showSetRightDialog(role) {
      //保存roleId
      this.roleId = role.id;
      //获取所有权限数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) return this.$message.error("获取权限数据失败");
      this.rightslist = res.data;
      // console.log(this.rightslist);
      //递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    //通过递归的形式，获取角色下所有三级权限的ID,并保存到defKeys 数组中
    getLeafKeys(node, arr) {
      //如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []; //清空上次遗留的id值
    },
    //点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      // console.log(keys);
      //将拿到的新数组变成用逗号拼接的字符串
      const idStr = keys.join(",");
      //发送分配请求
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, {
        rids: idStr,
      });
      if (res.meta.status !== 200) return this.$message.error("分配权限失败");
      this.$message.success("分配权限成功");
      this.getRoleList();
      this.setRightDialogVisible = false;
    },
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
